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Title: Multi-functional ultrathin Pd xCu 1-x and Pt~Pd xCu 1-x one-dimensional nanowire motifs for various small molecule oxidation reactions

Developing novel electrocatalysts for small molecule oxidation processes, including formic acid oxidation (FAOR), methanol oxidation reaction (MOR), and ethanol oxidation reaction (EOR), denoting the key anodic reactions for their respective fuel cell configurations, is a significant and relevant theme of recent efforts in the field. Herein, in this report, we demonstrated a concerted effort to couple and combine the benefits of small size, anisotropic morphology, and tunable chemical composition in order to devise a novel “family” of functional architectures. In particular, we have fabricated not only ultrathin 1-D Pd 1–xCu x alloys but also Pt-coated Pd 1–xCu x (i.e., Pt~Pd 1–xCu x; herein the ~ indicates an intimate association, but not necessarily actual bond formation, between the inner bimetallic core and the Pt outer shell) core–shell hierarchical nanostructures with readily tunable chemical compositions by utilizing a facile, surfactant-based, wet chemical synthesis coupled with a Cu underpotential deposition technique. Our main finding is that our series of as-prepared nanowires are functionally flexible. More precisely, we demonstrate that various examples within this “family” of structural motifs can be tailored for exceptional activity with all 3 of these important electrocatalytic reactions. In particular, we note that our series of Pd 1–xCu x nanowiresmore » all exhibit enhanced FAOR activities as compared with not only analogous Pd ultrathin nanowires but also commercial Pt and Pd standards, with Pd 9Cu representing the “optimal” composition. Moreover, our group of Pt~Pd 1–xCu x nanowires consistently outperformed not only commercial Pt NPs but also ultrathin Pt nanowires by several fold orders of magnitude for both the MOR and EOR reactions in alkaline media. As a result, the variation of the MOR and EOR performance with the chemical composition of our ultrathin Pt~Pd 1–xCu x nanowires was also discussed.« less
Authors:
 [1] ;  [2] ;  [3]
  1. State Univ. of New York at Stony Brook, Stony Brook, NY (United States)
  2. State Univ. of New York at Stony Brook, Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-108988-2015-JA
Journal ID: ISSN 1944-8244; R&D Project: PM037; KC0201030
Grant/Contract Number:
SC00112704; AC02-98CH10886; SC-00112704
Type:
Published Article
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 7; Journal Issue: 47; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; PdCu ultrathin nanowires; Pt monolayer; formic acid oxidation; methanol oxidation; ethanol oxidation
OSTI Identifier:
1329494
Alternate Identifier(s):
OSTI ID: 1235853